Add get_polymorphic_parent() helper for type_ref_columns compatibility

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

app/RSpade/Core/Database/Models/Rsx_Model_Abstract.php

@@ -425,6 +425,40 @@ abstract class Rsx_Model_Abstract extends Model
      */
     protected static $type_ref_columns = [];
 
+    /**
+     * Get a polymorphic parent using type_ref_columns
+     *
+     * Laravel's morphTo() reads raw attributes, bypassing accessors.
+     * Since type_ref_columns stores integers but accessors return class names,
+     * morphTo() crashes. Use this helper instead.
+     *
+     * Usage in model:
+     *   public function getParentAttribute() {
+     *       return $this->get_polymorphic_parent('parent_type', 'parent_id');
+     *   }
+     *
+     * @param string $type_column Column storing the type (e.g., 'parent_type')
+     * @param string $id_column Column storing the ID (e.g., 'parent_id')
+     * @return \Illuminate\Database\Eloquent\Model|null
+     */
+    protected function get_polymorphic_parent(string $type_column, string $id_column)
+    {
+        $type = $this->$type_column;  // Uses accessor - gets class name
+        $id = $this->$id_column;
+
+        if (!$type || !$id) {
+            return null;
+        }
+
+        // Resolve through morph map (e.g., 'Task_Model' → 'Rsx\Models\Task_Model')
+        $class = \Illuminate\Database\Eloquent\Relations\Relation::getMorphedModel($type);
+        if (!$class) {
+            return null;
+        }
+
+        return $class::find($id);
+    }
+
     /**
      * Get the casts array with automatic type casting based on database schema
      *